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The Mobile First Company SMS API

Send SMS messages to phone numbers using your Allo numbers.

The Mobile First Company SMS API is one of 13 APIs that The Mobile First Company publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include SMS. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

This API exposes 2 operations across 2 paths, and defines 6 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against a single base URL, https://api.withallo.com.

2 operations 2 paths 6 schemas 2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://api.withallo.com
Authentication
API Key, API Key, API Key, API Key, API Key
Contact
Allo Support
Resource Areas
1

Authentication & Security 5

The Mobile First Company SMS API declares 5 security schemes for authenticating requests. An API key is passed in the header as Authorization (CallsAuth). An API key is passed in the header as Authorization (ContactsAuth). An API key is passed in the header as Authorization (ContactsWriteAuth). An API key is passed in the header as Authorization (SmsAuth). An API key is passed in the header as Authorization (ApiKeyAuth).

  • CallsAuth — Scope needed: CONVERSATIONSREAD
  • ContactsAuth — Scope needed: CONTACTSREAD
  • ContactsWriteAuth — Scope needed: CONTACTSREADWRITE
  • SmsAuth — Scope needed: SMSSEND

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 POST. Each is listed below with its method, path, parameters, and response codes.

SMS 2

Send SMS messages to phone numbers using your Allo numbers.

POST
/v1/api/sms
Send SMS (US)
sendSMS body → 200400401403429
POST
/v1/api/sms#france
Send SMS (France)
sendSMSFrance body → 200400401403429

Schemas 6

The contract defines 6 schemas that model the data the API accepts and returns. The most detailed are TextMessageApiResponse (6 properties), SendSMSFranceRequest (3 properties), SendSMSRequest (3 properties), ErrorResponse (2 properties). Each schema is shown below with its type and property counts.

SendSMSRequest
object
Request body for sending an SMS message (US)
3 properties 3 required
SendSMSResponse
object
Standard response wrapper for sent SMS
1 property
ErrorDetail
object
2 properties
SendSMSFranceRequest
object
Request body for sending an SMS message in France using a verified Sender ID
3 properties 3 required
TextMessageApiResponse
object
Sent SMS message details
6 properties
ErrorResponse
object
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

the-mobile-first-company-sms-api-openapi.yml Raw ↑

Other APIs The Mobile First Company publishes across the network.

The Mobile First Company Analytics API
The Mobile First Company Calls API
The Mobile First Company Contacts API
The Mobile First Company Conversations API
The Mobile First Company CRM API
The Mobile First Company Partner API
The Mobile First Company Phone Numbers API
The Mobile First Company Power Dialer API
The Mobile First Company Summary Templates API
The Mobile First Company Tags API
The Mobile First Company Users API
The Mobile First Company Webhooks API
Where this information came from

This is an independent, third-party profile of The Mobile First Company SMS API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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